PLUG AND PLAY TECHNOLOGY - It takes no more than 10 minutes to install the door (no complicated wiring or cabling). BATTERY POWERED - Minimum of 1 YEAR battery life that works in all conditions (2xAA batteries included, you can replace them in 3 min, no need for solar cells). EASY TO USE - Easily programmable pushbutton. It automatically opens in the morning closes in the evening. You can set the timer or use the integrated (LUX) Light Sensor. WORKS IN EXTREME WEATHER - Waterproof ; will work in snow, rain, and dust from -15F to 140F (-26C to 60C). ALL IN ONE DESIGN - One piece; full aluminum doors and slider. High-quality powder-coated Fine structural color (explicitly designed for the external environment). Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!